Stitched Stalker

Menace
When Stitched Stalker enters the battlefield, target creature gets -3/-3 until end of turn.
Overload {5}{b}{b} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")
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In Thadu's Realm nothing goes to waste, not even the corpses.